Vitest

Overview

Vitest is a blazing-fast unit test framework powered by Vite. This skill provides complete Vitest documentation, APIs, configuration options, and migration guides to enable flawless test development in any JavaScript or TypeScript project.

Key capabilities:

• Vite-native for instant feedback and HMR
• Jest-compatible API for easy migration
• Works in Vite and non-Vite projects
• Built-in TypeScript, JSX, and ESM support
• Native code coverage (V8 and Istanbul)
• Browser mode for component testing
• Workspace support for monorepos

Quick Start Decision Tree

Is this a new project or adding tests to an existing project?